Drilling-machine.



c. K.' LAssITBR. DBILLING MACHINE.

I APPLIUATIOI FILED AUG.14, 1912. v

Patented Feb. 24, 1914L enum-snm 1.

G. K. LASSTBR. 'DBILLING MACHINE. Prmmrlon FILED ma. 14, 1m.

...m 1 9 1 4, k2 .hm e F M m P.

2. T E un E B E ma E H K B 2 A TTORNEY.

'iiErrEDI STATES COLUMBUS K. LASSITER,

PATENT oEEioE.

or RICHMOND, VIRGINIA.

DnILLING-MACHINE.

following is a full, clear, and exact description.

This inventionrelates lto improvements 1n drilling machines, and m'ore especially to g "'dirillingmachines comprising a post or iipright support, and a horizontal arm supported by and revoluble through part'of a circle about the post; and carrying a single or multiple drill spindles at its' outer end. ln machines of this kind, means are provided,

locking `the former against swinging movenient relatively to the latter when ,the arm is ad justably positioned'to bring the .drill spindle or spindles in proper lines relatively to the work to be drilled. inasmuch as the working place -for the operator is principally at the outer drill carrying end -of the arm, and Yin proximity to the piece to be drilled, it is a matter mccasioniifg incon'# venieiicc and loss of' time for him' preparatory to inw-lv positioning the drill and also after such pos-ilioning to first walk to the post and nnloclcilie arni, and thereafter lo again walk to the post to lreloclr 'the arm.

`he'j'n'incipal object oi this invention, therefore, to provide, in conjunction withtlnmeans located adjacent the revolubly conneled inner portion of the arm for detachably locking1 such arin to the upright 'support or posi, adevice operable on and 'for coifiiolliiiif the locking' nicans, the actuating' portion ol' which is located adjacent llic outer end ol' the ai'in.

()llier objects arc to provide improved 1 locking means: and to provide cflicient,

practical and comparativelysimple means for actuatinganv suitable device for lock j ingr the arin to the upright support,

'llie invention is described in conjunctioi'i with the accompanying drawings and is defined in and by the claims.

ln the drawings:--lf`igure -l is a side eleration of a drilling inacliine understood -aa of large size,- a'nd with a. comparatively long, horizontal revolu'bly swinging drill- Specification of Letters Patent.'

at or adjacent the place where the i arm is connected, revolubly, to the post i'or l Patented Feb. 24, 1914'.

Application lerl August l, i912. Serial No. 715,021.

carrying arm andy having locking device, andthe controlling portion l ot' the nieans for operating'sucli locking dej' vice accessible-to the workman adjacent the f drill carrying,r end of the arin.' Fig. 2 is a vertical sectional view through the inner portion of the arm and the portion of the upright support to which the arm is revolubly connected, and the novel parts combined therewith; Fig. 25 is a partial horizontal sectional and `plan View, on line 9i-3, Fig. 2': Fig'. Ll is a sectional view i threeovay valve included in the fluid pressure controlling means for the locking de# rice; Fig. 5 is a. partial elevation illustrating a modification of tiieoonstruction shown i inthe preceding views. ln' the drawings, A represents the horizontal and comparatively long,yr drill-spindle ci'irrying arm whichis connected, for a' rev-` plane, to the upright support therefor, here ,represented as comprising the post or standard B and the vertical feed slide C.

i l l l spindle at the outer end of the arm and l over the work supporting bed E, the spindle lin the particular machine represented in iFig. l being controlled by a hydro-pneul matic appara-tus, forming no part of this i' invention and not necessary to be particul larly referred to here, further than to State Q'tliat it comprises, as anoperative portion thereof, a flexible pipe F connected with an lid air compressor l* 2 5 neciion 'withA thc hydro-pneumatic drill spindle controlling arrnn erncnts.` i 'l'lie portion of' the upright support constituted by the vertical feed slide C has upper and lower horizontally inwardly eX- i tended brackets G G provided with hushed .journal bearing holes a a therein. lhe arm A at itsl inner end has vertical ,l axially alincd upper and lower hub or trun nioinlike meml-iers b Z constituting journals i Iwhich are fitted in the bearing holes of the j brackets as usual; and the arm just above i ilslower journal member I) has a portion d f of Cyn anni form' which is encircled by@ l constrictitie locking ring H rigidly afiixed i to and supported by the iiertical feed Slide C. l The split ringl has at its' side' opposite the r feed slide' the pair of outwardly .extended ear lugs f j adjacente/nd at either side of the present arm through a clubly swinging movement in a horizontal D represents the axially vertical drilly and having a valved cony axial movementsonthe 'shaft-by the shaft head c and-nut c2. Thesaid lever provided hubs i have ratchet shapedcams 7c 17u on their inner ends, in operative impingernent against the cams g g of the, split vring; ear

As manifest, any rotative movement of the earn faced lever hubs 1n one direction will force the ear lugs toward eachother 1 and cause a constrictionof the ring H vabout the cylindrical portionofthe arm, resultingv in the locking of the latter against r'evoluble movement relatively to the upright support; while, of course, the movementof thecain facedhubs' in thievreversed direction will free thering for its spring-reactive exmovement for* newly positioning the drill l relatively to the work.

The inner, jonrnaledv end of the arm A is made hollow to afford `a chamber for occupancy therein of aplunger weight K, the .lower portion of which has aI guided fit through an opening therefor centrally nection between pipes F and Q; or when positioned as represented'by the dotted lines it 4will shut off connection between pipes F and Q, but will leave pipes M, Q, open to exhaust through the port u.

The operating lever R2 of the valve R has a vertical rod R3 connected therewith, the saine passing through a guiding eye -w and. having a handle at its lower end, forming an adjunct of the controllingr means for the arm locking device conveniently accessible to the workman while at a position remote from the location of the lock.

Owing to the fact| that the head T by whichthev drill spindle, or spindles `are carried is movable horizontally inwardly and outwardly on the arm, and the valve R is, in effect, supported by such head, the pipes F and Q, are flexible; and it is fl'lrther to be understood 'than in the apparatus represented in. Fig. l, while a portion of the pipe F is i supported by the coupling` connecting pipes Q and M, these pipes at.- such place of union` pansion,.unloclting the arm. for its revoluble and of support for pipe ll are closed from' i communication with the pipe F.

The descentof the'elevated plunger K is t effective through the link and lever connec- I tions to cause the constriction of the split y through the lower journal b. The `plunger weight carries a cross harm at its pivotally connected with the extremities of lower end ring to lock the arm.; and fwhen the `plunger isin its lowered position for the elevation f 5 thereof to` release the locking devices, the valve is turned to the position shown in Fig.

et so that there is a passage of compressed air which is a pair of approximately vert-ical links 'n n, which are also pivotally connected from the'pipe 'F to and through the pipes Q and M, the same issuing: through the port g into the `cylinder L, displacing the latter' t0 the lever-'l-ike extensions j j of the cam faced members t'. The' plunger weight has, as an upward extension thereof, a closed hollow cylinder L, down into `which,-and

through the packing box in its upper end,-

ext-ends a rigid pipe M, for which a support y) is provided on the upper bracket G, and above rthe end Aof the hollow Yupper.larmupwardly and with it the plunger weight K,- itthus being seen that the establishing I of pressure, lby properly positioning the valve R', in and-through the 'pipe M raises and 'maintains the plunger'u'eight elevated,

los

, keeping 4the/locking devicereleased; while f journal. This vertical rigid pipe has a piston-like enlargement p at its lower end, i

.and a port g above the part p forming coni munication between the' pipe and the cylinder chamber,

Q, represents a pipe which is coupled t0 and has constant communication with the pipe M and the same evtends horizontally adjacent and to near.` the outer end of the arm A and .has by'short 'coupling pipe r a connection with-the aforementioned compressed air supplying pipe F. In the short coupling pipe 1" isl a three-way valve RJ the body thereof having port s in eon'nec-l l tion with ,compressedair supply pipe l?,'the opposite port t in oonnection with pipe Q, ,and the relief or exhaust port u opening to i the atmosphere.

The partially rotary body7 Iu of th'e valve has the cross .way y112,50 widened at its opposite ends that, as shown in full lines in Fig.4, it may open free coni to effect a locking of the arm the valve is positioned vto permit the exhaust of the pressure from the cylinder andpipes M and Q', leaving the plungerweight-to gravitatively and forcibly operate the locking device.

Instead of operating the locking device for the 'arm by pneumatic means asabove described, mechanical means maybe utilized for thisl purpose; and in Fig, 5 the ,pair of levers j which are understood as extensions of the cam provided hubs 'l' have a thrust rod lV connected therewith `which extends in substantial parallelism with and' to or near the outer end of the arm and adapted to' be operated manually.

This invention is susceptible of changes of minor, character, and in respect of details ofv construction without departing therefrom or sacrificing the advantages thereof as' defined in the appended claims.A

I claim v l; In drilling machine, a Support, having a bracket provided with a journal bearmany Leer/,eci

ity of 'said arm,U having outwardlyextended liigs Aadjacent. the cleft thereof, means -coaeting with said lugs for the constrictionol the ring, and a device for actuating said const-rioting means, i

wardly extending lugs adjacent Ythe cleft the. controlling or operating portion of 'Whichls located-adjacent the outer end 'it' thearin.

In a drilling machine, incombination,

4an upright support, having -a horizontally extended lbracket provided ,with .a vertical journal-bearing hole therein, a split ring mounted on said bracket'and having outwardly .extended lugs adjacent the cleft thereof, a horizontal arm having at the inner portion thereofv an axially vert-ical journal; fitting in said journal bearing hole, a drill spindle carried by the outer extremity of said arm, an oscillatory member having a cam coacting with one of said lugs for the constriction of said ring, and means for oscillating SaidV member.

3;'111 a drilling machine, in combination, an upright support,havingahorizontallyex- I a sj'ilitringoii, the support having an operating connection' with said lever, and fiuid pressure means operative to elevate the said plunger.

, (i. 'In a drillingmachine, in combination, an upright support, having a horizontal-lyv extended bracket provided with a, vertical journal bearing hole therein, a split ring tended bracket provided with a vertical jour l nal bearing hole therein, a split ring mountj ed on Said bracket and having outwardly exnected to the upright support and also made tended lugs adjacent the cleft thereof, provided with cam surfaces on their opposite v f jacent the revolubly located inner portion faces, a horizontal arm having at the inner portion thereof an axially vertif.al journal fitting in'said journal bearing hole, a drill spindle-carried by the Vouter extremity of said arm, a pair of rocking members journal v fluid pressure means for eleva-ting the plunsupported adjacent' said lugs and having cani face-s coacting with those on said lugs for the constriction of said ring, and means 5 for oscillating said rockingimembers.

r4. In a drilling machine, a support, a member connected to said support, means for locking said member against movement, a plunger, means connecting said plunger with said member locking means, means for operating said plunger for locking said member, jsaid plunger being movable to un- .lock said member independently of said operating means.

In a drilling machine, in combination, an upright support', having a horizontally extended bracket provided with a vertical journal bearing hole therein. a split ring mounted on said bracket and having outwardly extended' lugs adjacent the cleftY thereof. a horizontal arm having at the inner portion thereof anaxially vertical journal fitting in said journal bearing hole and formed with a cylindrical portion, a drill spindle carried by the vouter extremityo saidI arm, an oscillatory member comprising a cam'coacting. with one of said lugs, and a lever, a plunger vertically movable in the inner cylindrical portion of the arm and;

mounted, on said bracket and having outthereof, av horizontal arm having at the inner portion thereof an axially vertical journal fitting in said journal 'bearing hole and formed with a cylindrical portion encircled by said split ring, va drill spindle carried by the outer extremity of said arm, an os cillatoi'y device,compi'sing 'a cani coacting ivitli one of ,said lugsjfor the constriction i of the ring, a plunger vertically n'iovable in the inner portion of the arm and having operating connection with said cam'providcd oscillatory device, liuid pressure means co-A ol.) 0rative with and for vertically moving sai'd plunger in the arm conij'nising a cfmduitextended to a point adjacent iheoute'r i end 4of the arm and provided tl'iei'eal. with a controlli-ng valve.

T. ln a drilling niachine,`in combinfltion. an upright support, a horizontal arm han ing the inner portion thereof revolub'ly conholloiv, a drill spindle carried by theouter extremity of said arm, means located adof tbe arm for detachably locking the latter against revoluble movement, a plunger Weight Within the hollow arm and opcratively connected with said locking device.

ger weight `comprising a hollow cylindrical extension of such weight, -a stationary vertical' pipe having at its lower extremity a piston-like enlargement relatively to which said cylindrical extension is telcscopically movable, and such pipe having a port opening into the cylinder, and means coiinecting Said pipe with a compressed air supply and a conduit connected with said pipe, and extended to aioint adjacent the outer end of the arm, an provided thereat with 4a relief or exhaust valve., y

. 8. n a drilling machine, in combination,

an upright support, a horizontal arm hav- `fluid pressure means for elevating the pluri,

ger weight com' rising 'a hollow cylindrical extension of sue i Weight, stationary verti cal pipe having at its lower extremity a piston-like enlargement relatively to which i supply pipe and said'oonduit,"nd forflioth 10 saici cylindrical extension is telescopically closing such communication antopenng movable, and. such 'pipe having a port openconduit to air exhaust., v, I Y

ng into the cylinder, a Conduit connected 'Signed b meat Richrnond5-yirgina, lin y with said pipe and extended to a point adpresence o two subscribing witnesses.

jacent the outerend `of the arm, a conl l COLUMBUS K'. LASSITER. pressed air' supply pipe, coupled with seid l Witnesses: l A

conduit, and valve means for alternately u H. E. Boconsm'xlg' establishing communication between the. H. M. ELDER; 

